Path Computation Element (PCE) Protocol Extensions for Stateful PCE usage for Point-to-Multipoint Traffic Engineering Label Switched Paths
draft-ietf-pce-stateful-pce-p2mp-05

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Last updated 2017-10-30
Replaces draft-palle-pce-stateful-pce-p2mp
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PCE Working Group                                               U. Palle
Internet-Draft                                                  D. Dhody
Intended status: Standards Track                     Huawei Technologies
Expires: May 3, 2018                                           Y. Tanaka
                                                      NTT Communications
                                                               V. Beeram
                                                        Juniper Networks
                                                        October 30, 2017

  Path Computation Element (PCE) Protocol Extensions for Stateful PCE
 usage for Point-to-Multipoint Traffic Engineering Label Switched Paths
                  draft-ietf-pce-stateful-pce-p2mp-05

Abstract

   The Path Computation Element (PCE) has been identified as an
   appropriate technology for the determination of the paths of point-
   to-multipoint (P2MP) TE LSPs.  This document provides extensions
   required for Path Computation Element communication Protocol (PCEP)
   so as to enable the usage of a stateful PCE capability in supporting
   P2MP TE LSPs.

Status of This Memo

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   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on May 3, 2018.

Copyright Notice

   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of

Palle, et al.              Expires May 3, 2018                  [Page 1]
Internet-Draft                STATEFUL-P2MP                 October 2017

   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   4
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Supporting P2MP TE LSP for Stateful PCE . . . . . . . . . . .   4
     3.1.  Motivation  . . . . . . . . . . . . . . . . . . . . . . .   4
     3.2.  Objectives  . . . . . . . . . . . . . . . . . . . . . . .   5
   4.  Functions to Support P2MP TE LSPs for Stateful PCEs . . . . .   5
   5.  Architectural Overview of Protocol Extensions . . . . . . . .   6
     5.1.  Extension of PCEP Messages  . . . . . . . . . . . . . . .   6
     5.2.  Capability Advertisement  . . . . . . . . . . . . . . . .   6
     5.3.  IGP Extensions for Stateful PCE P2MP Capabilities
           Advertisement . . . . . . . . . . . . . . . . . . . . . .   7
     5.4.  State Synchronization . . . . . . . . . . . . . . . . . .   8
     5.5.  LSP Delegation  . . . . . . . . . . . . . . . . . . . . .   8
     5.6.  LSP Operations  . . . . . . . . . . . . . . . . . . . . .   8
       5.6.1.  Passive Stateful PCE  . . . . . . . . . . . . . . . .   8
       5.6.2.  Active Stateful PCE . . . . . . . . . . . . . . . . .   9
       5.6.3.  PCE-Initiated LSP . . . . . . . . . . . . . . . . . .   9
         5.6.3.1.  P2MP TE LSP Instantiation . . . . . . . . . . . .   9
         5.6.3.2.  P2MP TE LSP Deletion  . . . . . . . . . . . . . .   9
         5.6.3.3.  Adding and Pruning Leaves for the P2MP TE LSP . .  10
         5.6.3.4.  P2MP TE LSP Delegation and Cleanup  . . . . . . .  10
   6.  PCEP Message Extensions . . . . . . . . . . . . . . . . . . .  10
     6.1.  The PCRpt Message . . . . . . . . . . . . . . . . . . . .  10
     6.2.  The PCUpd Message . . . . . . . . . . . . . . . . . . . .  12
     6.3.  The PCReq Message . . . . . . . . . . . . . . . . . . . .  13
     6.4.  The PCRep Message . . . . . . . . . . . . . . . . . . . .  14
     6.5.  The PCInitiate message  . . . . . . . . . . . . . . . . .  15
     6.6.  Example . . . . . . . . . . . . . . . . . . . . . . . . .  16
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